Tire-valve



. By flffamg s, 5mm Qwvk k Ty Patentedlune 1919.

L K U H P KRAFT TIRE VALVE.

LICATION FILED SEP .1. I

lTNhsbEb:

il/ww HENRY P. KRAFT, OF RIDGEWOOD, NEW JERSEY.

TIRE-VALVE.

Specification of Letters Patent.

Patented June at, lie.

Application filed September 1, 1915. Serial No. 48,389.

To all whom it may concern Be it known that I, HENRY P. KR FT, a citizen of the United States of America, residing in Ridgewood, in the county of Bergen and State of New Jersey, have invented certain new and useful Im rovements in Tire-Valves, of which the ollowing is a specification.

This invention relates to tire valves and aims to provide certain improvements therein;

The invention is particularly directed to the well-known Schrader valve and is designed to provide a top guide for the valve whereby to insure that the latter shall be properly seated.

In this type of valve a plug member is provided which screws into the openendcd socket of the valve shell and holds the valve seat in position therein. Such plug member may be formed separately from the seat or may be an integral part thereof. According to the preferred form of the invention the plug member is utilized as a guide for the valve. through the medium of the socalled deflating pin which extends through it. In the usual construction the hole or bore through the plug must be sufficiently large to admit proper quantities of air through the valve in inflating the tire or other device to which the valve is applied. Hence the deflating pin cannot fit so closely as to make a very accurate guide for the valve. In the present invention the plug is formed with a bridge which is provided with a hole of smaller diameter than the main portion of the hole through the plug so that the pin may make a close guiding lit with the bridge, while suitable passages for the air are provided in the sides of the bridge which connect with the main hole through the plug, thus retaining the maxi mum passage through the latter.

Referring to the accompanying drawlngs which illustrate the invention,-

Figure 1 is a side elevation of the working parts of the Schrader valve, illustrating the invention, the shell or casing being shown in section.

Fig. 2 is a longitudinal sectional view of Fig. 1.

Fig. 3 is a vertical section in aplane at ri ht angles to Fig. 2.

Referring to the drawings, let A indicate the casing of a valve shell having screwed in its outer end a plug B which screws entirely within the shell which is swiveled to a valve seat C, the latter having a packing washer D designed to contact with the tapered walls of the casing to form an air tight joint between the two. The valve proper indicated at E being carried upon a pin F which passes upwardly through the seat member C and plug B to a point near the top of the valve, as best indicated in Fig. Below the valve proper is a loading spring lr, the lower end of which engages the-top of a cup shaped guide H. The lower end of the pin E passes through the cup H and is guided in its movements by the latter.

According to the present invention the plug B is provided with a bridge Jwhioh extends the full diameter of the bridge in one direction while in a direction at right angles thereto it is suficiently narrow to be engaged by a slotted valve cap to form a means for screwing in and unscrewing the plug. The plug B is formed on its interior with a bore or opening K which should be of as large diameter as possible in order to permit the maximum quantity of air to pass through the plug. Tn rior constructions this bore has been carried the full length oi the plug with the effect that the top of the pin E has not been efficiently guided since it was capable of tilting to a considerable extent, thus permitting the valve proper E to tilt'to a slight degree on its seat. The bridge J according to the present in vention is provided with a hole or aperture L which is of slightl larger diameter than the pin E so'that while the latter may slide freely through it it nevertheless is accurately guided. The passage thus formed between the bridge and pin is very small and would not be sufficient to permit the infiow or outflow of the air with sufficient rapidity in practice. To provide the neces sary passage openings N are rovided referably on both sides of the bridge whic extend upwardly, so that when the plug is screwed into the valve shell they will not be covered by the shell. This is best seen in Fig. 3. in constructing the parts the plug is drilled from the bottom to the proper point and a smaller drill is then run through the bridge L either from the top or the bottom. The metal is cut away at N N (Fig. 3) at the sides of the plug to form ios ire

the lateral walls 'of the bridge either before or after the drilling operations, or between the two drilling Operations. as desired.

The invention is appli able to other constructions than that shown, wherein the plug and valve seat are made as separate parts. The invention is also capable of various i'nodifications.

I claim as myinvention 1. In a valve for tires or the like, the combination of a shell, a plug screwing in said shell, a valve proper beneath said plug, a pin extending upwardly from said valve proper through the plug, and said plug having a bridge for guiding the upper end of said pin, and having openings at its top on each side of said bridge.

2. In avalve for tires or the like, the combination of a. shell, a plug screwing in said shell, said plug having a bore of larger diameter formed therein, abridge above said bore having a hole of smaller diameter than said bore, and said plug havin a lateral passage to said bore beneath said ridge, said passage opening at. the top of said plug, and a valve proper having a pin extending upwardly through said bore and bridge.

3. For tire valves. or the like, a plug-having a bore passing, partly through it, a bridge above said bore and having a hole of less diameter than said bore, and said plug having a lateral passage to said bore, said passage opening at the top of said plug.

4. For tire valves or the like, a-plug having a bore passing partly through it, a bridge above said bore and having a hole of less diameter than said bore, and said plug having a lateral passage to said bore, said passage opening at the top of said plug in combination with a valve proper havin a pin extending through said bore and bri ge.

In a valve for tires or the like the combination of a shell, aplug screwing into said shell, a valve proper beneath said plug, and said plug having a screw-driver projection extending completely across the top thereof, at its middle.

6. In a valve for tiresor the like, the combination of a shell, a )lug screwing into said shell, a valve proper beneath said plug, said plug having a screw-driver projection extending completely across the top thereof at its middle, and a pin on the said valve proper extending through a hole in said screw-driver projection.-

7. In a valve for tires or the like, a plug having a bore and a screw-driver projection extending across the top of said bore from one side of the plug to the other.

- 8. In a valve for tires or the like, a plug having a bore and a screw-driver projection extending across the top of said bore from one side of the plug to the other, and a valve proper below said plug having a pin extending upwardly through said screwdriver projection.

In witness whereof, I have hereuntosignedmy name in the presence of two subscribing witnesses.

HENRY P. KRAFT.

WVitnessesz' THOMAS F. WALLACE, F RED WHITE. 

